Sheet-coating machine.



E. M. HAWKINS.

SHEET COATING MACHINE.

APPLICATION FILED DBO. 23, 1911.

Patented Sept. 1, 1914.

1 SHEETSSHEET l.

Q Vi/Wmo:

THE AORRIS PErERs 60.. PHOTD-LITHIZ. WASHINGIUN, B4 c.

E. M. HAWKINS. SHEET GQATING MACHINE. APPLICATION FILED DEC. 23, 1911.

Patented Sept. 1, 1914.

4 SHEETS-SHEET 2.

LIE .JORRIS PETERS C02: PHOTU-LITHQ. wAsInNu run. 17

E. M. HAWKINS.

SHEET COATING MACHINE.

APPLICATION FILED D120. 23. 1911.

4 SHEETS- SHEET 3.

Patented Sept. 1, 1914.

aw/1mm In: AORRIS PETERS C0,. PHOTO-LITHQ, WASHINGTON, D. c.

E. M. HAWKINS.

SHEET GOATING MACHINE.

APPLICATION FILED DBO. 2a. 1911.

1,109,331, Patented Sept. 1, 1914.

4 SHEETS-SHEET 4.

ami/WW0: I 1 a 1U. I V $l wwwnu fcx I THE rH/RRIS PETERS COH'PHQTO LITHOH WASHINGTON. I). u.

a a machine of the type disclosed in my prior application, Serial No. 652%, filed July 29,1911, for coating or gumming sheets, such as labels, wrappers, etc., successively To all whom it may concem:

UNITED sT 'rEs PATENT oFFIc EDGAR M. HAwKnvs, or nocnnsrnn, New YORK,:1 AS"SIGNOR TO M. D. KNOWLTON COMPANY, 'or nocnnsrna, NEW YORK, A CORPORATION or 'NEW;YOBK,

sneer-comma ivrncninn.

Be it known that I, EDGAR M. HAwKnvs,

citizen of the United States, and resident of Rochester, inthe county of Monroe and State of New York, have invented certain new and useful Improvements in Sheet- Coating Machines, of which the following is a specification. I i

gThis invention relatesto :aisheet-coating machine and particularly to a, sheet-coating and automaticallyiby power mechanism. A

machine of this kind is useful mainly for gumming sheets to be appliedone at a. time] to boxes or other articles, and the present invention is directed primarily to a machine adapted for use in this way,'it being an 1mprovement upon the invention disclosed in my aforesaid prior application. said, ap& plication there is disclosed a machine adapt ed to deliver gummed sheetsin a manner controllable by the operator who is to paste.

said sheets on boxes, etc, One important feature of sand machine ismechanism' under the control of the operator for affording an intermittent-feed ofesheets to suitable:

gumming means, and one of the main features of such mechanism s the provlslon of means for reducing the friction ofthe feeding means onfa 'sheet at a -predetermined point in the operat1on;.of;the machlne so as not to -interfere with, the delivery of the sheets [to the gumming means. Another feature of said machine is the provision: of

devices for applying pressure to a sheet or bunch of sheets atdifferentpoints for the, purpose of holding" the sheets inproper re-" lation with a feed-roll andlalsofor the pur pose ofassuring the feed of the sheets, or labels one at a time to the gumming means.

In said machine, however, .the various'parts controlling the intermittent feeding of 'indi- I vidual sheets orlabels to the gumming means were such thatin practicethe apparatus there disclosed was limited tothe use of; sheets or labels of a certain range of dimensions and it was impossible to. make. use

in said machineofsheetsor labels of certain other dimensions. v

, -The present invention is directed to means forincreasingthe range 0f -operatio'n of a machine of the general type d sclosedin the sp a i e iaen" PatentedSept. 1,'1914l .Applicationfiletl December 23,1911. se i 1e6a444.

I aforesaid applic'atiom'and particularly to i the provision of means for feeding very nar- '-row; as well as broad labels and Whether longer or shorter than thecircumference of lthe feedrroll constituting the main element of i the --feed mechanism. .Thes'e and other features. ofjflthe: invention not hereinbefore referred to willbe hereinafter described and R med,and-are illustrated in the accom- P y qg drawings, in which,& I

: "F gurejl -'s;aside.elevat1on of a sheet- I coating machine particularly adapted. for" use as a label-gumming machine, parts be- 7 .111g broken away to illustrate;YtheJcon truc-I tio'n clearly; Fig. Qis agplanofthe'same;

QFigMSiS a substantiall .central, verticallongitudinal sectionof t e same, showing the positions of. thelparts when the feed-roll is at rest; FigLA is an enlarged'sectional'rear elevation .of aportion of the machine,illustrating particularly the :feed-rolhand the means for starting and stopping it; Fig. 5

;is;a vertical longitudinal section of-the same, I

the section being taken, in the .line 5-5 {of Fig. 45,"and the feed-roll beingshown in operative relation with the driving mechanism. a

Similar reference characters designate like partsin all thefiguresof the drawings.

Nearly all of the fixed and movable parts of; the Tmechanism embodying the present nvention' are, or: may be, substantially the same as the corresponding partsof themae chine shown-in my aforesaid application. These parts with the exceptions hereinafterl noted are as, follows The main frame of the machinesisgpreferablyfa casting 2 for supporting the-moving parts rand/at the same time containing the glue or other ,ad-

hesive toj-be" applied to the sheets. The base of this casting also has means formaintain jing the glue. in a? properfliquid condition throughout the 'operati'oniof the machine. At itsforward end the base is extended, 'as

shown '3', to supp ort v the forward operat 1 ing parts and also to permit the glue-trough or reservoir to extend suificientlyffar for ice ward, At its rear end "the base has bracket extensions 4, forsupporting the operating parts of themechanism at the/rear of the machine] 9 r The vprincipal means for maintaining the, sheets llll' proper position I for engagement by the :feeding operating mechanisms are: 7 feedlng; means for feeding the sheets suc-m cessively' to, the gummlng means holdlng y the band-wheel 6 to impart A power-operated feeding means adapted to be brought into operation to feed sheets intermittently is employed, the feedingoperation being under the control of an operator at the forward end of the machine in position to remove sheets from the gummmg means as fast asthey are gummed. The speed of delivery of the sheets is also under the control of the operator. he feeding means is driven from the main shaft 5, as is the gumming means. :The shaftfi is driven-by a band-wheel .6. from aisource of power 'not shown)v and is mounted in hearings in the side frames 7 near the longitudinal-center of. the machine. A ratchet-wheel 8 is-splined on the shaft 5. Said shaftand ratchet-wheel are intended to be continuously rotated by termittently. to .a suitable feed member, such as the feede'roil19,;locatedsubstantially at the transverse centeriofthe machine,-a'sf{is the ratchet-WheelQS. Asin-my aforesaid application ;the periphery of the feed-roll is-pref-' erably covered with a suitable flexible ma: terial, such as rubber, for a sufficient dis-' tance togripv the sheets or labels firmly and positively feed them through the machine to the gumming means. be brought intermittently into engagement with'or" disengagedfrom the power mechanism ust described for driving it, by suitable coupling means, such as a pawl l0 p'ivoted at llinsi'de the-feed-roll and having a tooth 12 adaptedto beprojected into the path of the teeth of the ratchet-wheel 8 and engaged thereby. A spring 13 normally holds said pawl in position to be clutched by the ratchet-wheel; hence the feed-roll is normally; clutched to the shaft 5 and rotates therewith.

The feed member shoWn is combined with means for-holding a sheet in operative relation therewith. In the machine of my prior application the construction is such that this feed member is mova-ble'into and out of contact with each sheet of a pile or bunch of sheets carried by suitable' sheetholding means, but in the present case the feed member or feed-roll is normally conti'nuously'in contact with a sheet. In this case, as. in the other, means is employed for feeding sheets successively-from a pile orbunch, and the friction between the feedroll and the sheet is reduced ata predetermined. point i in" the 1 operation of the machine, to wit: when a sheet or label reaches and isengaged by th'egumming means. The reduction of friction at the point of contact ofthe feed-roll and the sheet takes place intermittently and. in the" present machine is duewhol'ly to the constructionof the feedwhich the sheets are movement in This feed-roll may roll is automatically stopped. The friction has a comparativelyhigh co-efficient of friction being intended to feed each sheet positively through the machine'to the gum- }ming meansso long as said sheet is in con- Jtact with that section, while the other secso tion, which has a comparatively low cos efiicient of'frictio n, is intended to-permit of 'a ready slippage between thesame and the sheet when" in contact with each other. This feed-roll surface 14 having the lowercoeflicient of friction is intended to be brought to the position shown in Fig- 3 each time a sheet is fed forward'far enough to bring itintoQproper cooperative relation with the gumming means. At this time the feed r011 will be stopped in its idle position and the face 14, which will usually be a polished .metallic surface, asfor example of brass, will receive the pressure previously borne by the rubber surface of the feed-roll. This transfer of pressure from the surface haviing-the higher co-efiicient of friction to that having the lower co-efiicient of'friction takes place substantially at the time that the feedof rest between the metallic surface let and fthe uppermost'sheet of the pile of sheets will then be comparatively slight and will be freadily overcome bythe pull of the gumfming roll upon the forward end of the sheet, and hence whatever may be the length of the sheet it will be positively drawn through the machine by the gumming roll after the feed-roll has been automatically stopped.

The means hereshown for starting and gstopping the feed roll, being the same as thatof my aforesaid application, comprises a trcadleopera'ted shifting-lever l7, pivotally connected at its upper end to a slide or :pin 18, secured at its inner end to a radial car or lug 19,0f a sleeve 20, mounted to slide freely on the sl1aft5, While the shaft turns freely therein. This sleeve is suitably held against rotation by means a on the frame-Work. It also has a second ear or lug 82 with a pin 23 in fixed relation therewith for cooperation with the pawl 10. Normally a coiled spring 2-fi forces the'sleeve 20 and the pin 23 inwardinto the plane of rotation of the feed-roll, which is open at the end adjacent to the pin 23, it being illustrated as having an annular end-plate 25 with a large central opening.- The major portion of the inner edge of the pawl 10 when out of action is definedby the same circle that defines the opening in the plate-L; The pin 23 liesijust within thiscircleandmoves into and out of the opening in the plate 25 ina paththatf clears all-of the operating parts except those portions, of the pawl lOpwith which ,it is intended to" cooperate. The pawlv has arise 26, followedby a compression or looking notch 27, immediately adjacent to the tooth of thjef pawl. Normally whenwthe foot of the operator is released from the operating treadle (not shownl the :pin 23 will be forced into the open ng in the end of the kfeed-roll and, as saidnfeed-roll turns, the

inner edge jofthe. plate 25 will pass around said, pin without interference. until the pawl 10 comes )into position for operation, when said pawl will strike the pin and, b forced out-to the position shown inFig. '3, said pin travel of the pawl. The projection 26 preriding over the PIfOjGQtlOIljQG lIld intothe locking recess at the proper-point in the vents back-lash and assures thelocking of the feed-rollin'the-position shown in Fig.

trolled by saidisha ft. 1

In connectlon with the devicesljust des scribed for feedingsheets tothe gummin'g means, sheet-holding means similar to that of my aforesaid application will be employed; lhe sheeteholder proper is indi-f catedat 30, and is pivoted at 31; inbearings "atfthequpperl rear ends of the brackets 4;, At these: upperend'sf it has an arcof move ment sufficient to accommodate" a pile: of sheets of suitablelthickness. I Feed pressure; is, j exerted against the sheet-holder at i one side thereof torhold the uppermost's'heet. of

means shown for this purpose being j a ings on the frame-work and having; a camarm 34C,on which the "sheet-holder rests."

The feed pressure exerted maybe varied by I ,means of. the adjustable weight35, mounted toslide-onthelong arm of the lever and to lee fastened at any desired point thereon. Said cam-lever is swung to the position shown by the dotted line in-Fig. 1 whenever a bunch of, sheets is to tbe placed on the sheetiholder. The upward movement of this cam-lever is limited, as by means of stops 36 and i 37, "one on the lever and the other on the frame-work. In addition to these devicest forjexerting pressure on the sheet:

holde'rand sheets-to bring the latter into proper relation with the feed rOll, means similar to that ofmy aforesaid application is employedfor exerting opposing pressure needle -fpoints,', 38, are shown as heldf iin tn (the sheets ,keep them i in proper posi- I tionlfor feedingand assuring their being fed from the pile, one 5 at a time A only. a This op' posing pressure" is J exerted f downwardly. at therefarend of the sheets'and'in opposition tothe upward feed pressure atthe forward end of the .sheet, the holding, means Temployedrbeing designated generally by H;

Animportant feature of it is the provision of suitable means for exerting pressure on a smanarea [or areas only of the sheet, the construction found best for the purpose be ingvone in which needle-pointedjholding devices are used, the needle point'or poi'ntsbee ingcso'set as to engagejthe sheet very; close to, the rear; end thereofsay within one eighthjorthree-sixteenths of an inch of the rear edges-J When so, held each-sheet ,when

short, firie slit" cut in it byzthe needle point ofeach holding device, which slit is so jnar-y 'drawnforward by the feeding means, has a rowrasto, do no harm, as ,itisnot noticeable when the "sheetis applied to aboxorother articlejfl'lhe meansvemployed exerts a conv stantypressure on the upper, rear end of-"the.

pile of sheets, butitsfposition lengthwise of the line of travel of the sheets may bevaried at twillin order that it mayycooperateiprop 'erly with sheets of various, 1 lengths. Two

chucks.39,'mounted in a sleeve 140;, adjustable in a verticalybearinggll in} a {cross-head; 42-, mounted to, slide on afpairof slide-rods 43 forming parts,of-a'pivot-frame or needlecarriage, theipivot point of which is in a rock-shaft 44; mounted in bearings on the aboutiits axis in therock shaftt l ir; Therods 43 rest inhalf-bearings-e'i' rising from the rear bracket-arms 4.1 Clamp-screws48;;are secured to, the cross-head 42 and the parts. .c the pilein contact withthe feed-roll, the

A counter-weighted cam-lever 32, fastenedto a rock' shaft 33,- mounted in suitable-bear:

securedtherebvflin any desired position lengthwise of" the. needlercarriages The by grasping their weighted heads 49 and 1-10 a needle-pointed holding devices maybe raised i 1 turning themtjabout 90, bayonet slotsbeing shown at 50 in'the, sleeves 40 for this spur-r pose. @These devices are elevated whenever t becomes necessary to. refill the sheet holder, stops-being shown at ;5 1 for holding saiddevices in; this elevated position. Suit-l able guidesg-such as 53, arera-lso employed at.

opposite sides; of a bunch of sheets forv locat-,

;ing the sheetsvsidewise. These; guides or gagesmay .be ofanysuitable kind and'adjusted in any well-known manner (see Fig, i 2). By means *of' them very narrow strips may beproperly' located in the central line of .feedof themachine, that is, in alinement with thefeedroll, and'hencethe feed-roll will cooperate properly with sheets ;of' all.

widths fromffthe widest-ate, the narrowest" lwithin'athefcapacity of the machine; 1:?

' the I giimmin roll.

mounted in a swinging frame 60, having its 7 The' -gum ming means employed embodies as its main elenienta trough or reservoir for glue or other adhes1ve,and a glue-roll or gumm1ng-roll-56. The gumming-roll cooperates with and is lo'cated close'to the feed-roll. 'It is preferably Continuously 'rotated from the main shaft bymeans ofspurgears, 57' and 58, secured respectively'tothe main shaft '5 and to a shaft 59 carrying =This igumming-roll is axis of movement in the shaft 5. At its for Ward ends the. frame 60 supports a longitudinally-movable: shaft 61, carrying pickoff fingers v62, weighted at 63 to maintain and move in a path above the latter andbe neath the plate 66into contact with the gummed surface of the gumming -roll by which each sheet is carried upward; and

under the fingers 64; I s

From .the'j foregoing it will be seen that my improved feeding means embodies a feed-rod that permits proper feeding of sheets or labels either of [less lengthiorof greater length than' the circumference of the feed-roll, and this is=not the casefwith the feed-roll shown in my aforesaid appli cation, the use of which unaided by outside means, is limited to sheets or labels-of substantially the same lengtlras the circumference of the feed member. It will also'be seen that 'narrow sheets or labels-that is, sheets or labels ofieven less width than-that of the feed roll, co-act withgsaidfeed-roll,

in substantially the same manner as wide sheets or labels, and this also is inot the case in the-mechanism of the: aforesaid -application in which the construction was such that in order :to be fed through the machine properly, thesheets or labels'had to be at least wide enough to be engaged by cer tain idler rolls to whichthe feed pressure was transferred on the stopping of the machine. In the present case the 'feedlpressure is always borne by the feed-roll and is: transferred first to one and then to the other of its surfaces at differentpoints'in the operation of the machine, as and=for the purpose hereinb'efore described.

'Ihe action of the feed roll of the present machine, in so farras its surfacexlat is con' cerned, may. be briefly described :as follows WVhen the feed roll is turning with its surface 14in contact with-the uppermost sheet of the bL1nch,'the friction of said surface against the sheetis insuflicient to overcome the grip ;of the holding needles/upon the sheet; and-when the feed 'rol-l; hasiicome to 1 by-"stop said'rolli thereto, I roll, and automatic means operablewhen'the' of rest will "be readily overcome and the sheet permittedto' be drawnthrough by th action of the gummingroll. a r

' 1. In a machineof the character described,

a rotary power-"operatedfeed-controlling device embodying successive circumferential sheet-engaging surfaces having different coefficients of friction'and one or the other of which is normally in contact with a sheet and one of which is operative for feeding a sheet to themachine and the other ofwhich permits said sheet to readily slip relatively thereto, a'ctuati nguneans to rotate said feed roll, and automatic means operable when the surface of less co-effi cient of friction is in contact with'the sheet to disconnectthc actuating' means from the feed roll and there:

:2. In a machine of the character described,

I a rotary po-vs' er-operated feed-controlling de- -v1ce embodying successive circumferential sheet engagmg" surfaces having 'differenticoefliciients of; friction andone or the other of which 1s normally' in contaotwith a sheet and one of which is' operative for feeding a sheet to the machine andthe other of which }permits said 'sheet-toreadily slip relatively thereto, actuating means to i'otatesaid feed "rolls-and automatic meaas'opemble wh'e'n the surface of less co-eflicient 'ofgfriction is in contact with the sheet to discon'nect'-tl1e"ac-;

tuating means frointhe'feed roll and thereby stop said roll, said means adaptedto, posi tively hold said feed roll against further rotation; V 3. Ina machine of the characterdescribed,

I a rotary power-operated feed controlling'device embodying successive circumferential sheet engaging surfaces having different 00- efiicients of friction and one or the otherfof which'is normally in contactwith asheet and oneofwhich is 'operativefor feedingai sheet; to the machine and the other of'which permits sa d sheet to readily slip'relatively actuating means to rotate said feed surface of"les's co-efiicient of friction ini'n" contact'with the sheet to disconnectthe ac [tuatin'g means from the feed roll and there bystop said roll, said means adaptedto'positivel y hold said feed roll against further rotation, but operatable to release {the feed roll and reestablish the connection between; the

same and theactuating means. V

4 In a1mach1ne, of the character described,

a rotary power-operated feed-controlling device embodying successive circumferential sheet-engaging surfaces having diiferent'coeflicients of friction and one or the other of which is normally in contact with a sheet and one of which is operative for feeding a sheet to the machine and the other of which permits said sheet to readily slip relatively thereto, actuating means to rotate said feed roll, and automatic means operable when the surface of less co-eflicient of friction is in contact with the sheet to disconnect theactuating means from the feed'roll and thereby stop said roll, said means adapted to positively hold said feed roll against further rotation, and said means being under-the control of the operator to release said feed roll and reestablish the connection between the same and the actuating means, a

5. In a machine of the character described,

a rotary power-operated feed roll, the whole peripheral surface of which is movable in a path that intersects the path of travel of the sheetbeing fed andis made up of two secdisconnect the actuating means from the feedroll and thereby stop said roll.

Signed at Rochester, in the, county of Monroe, and State of New York, this 11th day of December, D. 1911.

p I .[EDGAR HAWKINS. witnessesz I I THos. D. PAT'roN,

' ARTHUR CLAFrnnL Copies 01 this patent maybe obtained for five cents each, by addressing the Commissioner of Patents Wa-shington, 1). GP y 1 

